Drag-reducing abrasion-resisting solventless coating for pipeline as well as preparation method and application thereof

Abstract

The invention relates to a drag-reducing abrasion-resisting solventless coating for a pipeline as well as a preparation method and application thereof. The drag-reducing abrasion-resisting solventless coating contains an A component and a B component, wherein the mass percentage of raw materials is as follows: the A component includes the following materials in percentage by weight: 30%-40% of epoxy resin, 5%-10% of toughening resin, 4%-8% of active diluents, 4%-8% of zinc phosphate, 0.2%-0.5% of levelling agents, 0.2%-0.5% of defoaming agents, 0.4%-0.8% of dispersing agents, 0.2%-1.0% of anti-settling thickening agents, 8%-20% of ferric oxide red powder, 5%-15% of aluminium triphosphate and 5%-15% of white pottery magnetic powder; the B component includes the following materials in percentage by weight: 5%-20% of modified amine and 2%-10% of modified polyamide; and the A component and the B component are matched for use according to the mass ratio of 3-5:1. The drag-reducing abrasion-resisting solventless coating is prepared through material blending, dispersion, grinding, filtration and packaging and can be applied in delivery pipelines of oil and natural gases. The drag-reducing abrasion-resisting solventless coating does not contain volatile solvents and has the advantages of good adhesive force, flexibility, salt spray resistance and solvent resistant property, smooth coating surface, good drag-reducing abrasion-resisting effect, convenient construction, resource saving and good popularization and application prospect.

Description

technical field

[0001] The invention relates to the technical field of coatings in chemical technology, in particular to a drag-reducing and wear-resistant solvent-free coating for pipelines, a preparation method thereof, and a method for applying (spraying) the solvent-free coating in large pipelines. Background technique

[0002] The large-scale pipeline described in the present invention refers to the large-caliber long-distance oil and natural gas transmission pipeline with a diameter of more than 500mm used in the petroleum field. Use specialized paint. What the present invention mainly relates to is the drag-reducing coating in the pipeline, therefore, just no longer discuss other coatings.

[0003] The existing (domestic) large-scale internal drag-reducing coatings are all solvent-based coatings. The disadvantages of solvent-based coatings are: high VOC content, sensitivity to moisture in the environment, poor construction operability and storage stability of coatin...

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